<html>
<head>

<style id="s">
.container {
  height: 30px;
}
</style>

<style>
.overflow {
  height: 150px;
  border: 1px silver solid;
}
body {
  height: 60px;
  width: 300px;
  -moz-column-width: 50px;
  -moz-column-gap: 1px;
  -moz-column-fill: auto;
}
</style>

</head>

<body onload="s=document.getElementById('s'); s.parentNode.removeChild(s);">

<div class="container"><div class="overflow"></div></div>
<div class="container"><div class="overflow"></div></div>

</body>
</html>
